Hi everybody

I have a little question. I am using JFileChooser to open file and then process it.But the thing is its only works for txt file. What are the other ways to open all ither text files. Plus if would be really helpful if you would tell me how to process pdf files.

/**Theis program prompts user to open file
 * then it counts and displays number of tokens.
 * 
 *
 * 
 */


import java.util.*;
import javax.swing.*;

public class WordCounter {
	
	// main map Keys are elements and Values are number of elements 
	private Map<String, Integer> map = new HashMap<String, Integer>(); 
	private Scanner file;
	
	public static void main(String[] args) {
		new WordCounter();
	}
		
	public WordCounter() {
		openFile(); 
		createFileMap();
		displayFileMap();
	}
	
	// this method opens file
	public void openFile() {
		JFileChooser myChooser = new JFileChooser();
		int status = myChooser.showOpenDialog(null);
		
		try {
			file = new Scanner(myChooser.getSelectedFile());
		}
		catch (Exception e){
			System.err.println("Can not open file");
			System.exit(0);
		}
	}
	
	//creates a Map
	public void createFileMap() {
		//read the file, line by line
		while(file.hasNextLine()) {
			// put the current line into str
			String str = file.nextLine();
		
			// breaks a line into tokens
			StringTokenizer tokenizer = new StringTokenizer(str); 
		
			//check if there are more tokens
			while(tokenizer.hasMoreTokens()) { 
				// assign current token to the word
				String word = tokenizer.nextToken(); 
			
				/*if Map has current word add 1 to the maps value
				  if no then associated current word with value 1*/
				if(map.containsKey(word)) {
					int count = map.get(word);
					map.put(word, count +1);
				}
				else
					map.put(word, 1);
			}
		}
	}
	
	//display map
	public void displayFileMap() {
		//returns a Set view of the keys contained in map
		Set<String> keys = map.keySet();
		System.out.println("\nMap contains elemets: \nKeys\t\tValues");
		
		//Sort keys
		Set<String> sortedKeys = new TreeSet<String>(keys);
		
		//print each key and its value 
		for(String key : sortedKeys)
			System.out.printf("\n%-10s%10d", key, map.get(key));
				
		// display the map size 		
		System.out.printf("\n\n%-10s%5d\n%-10s%11b",
				"size of map is :", map.size(),
				"map isEmpty: ",map.isEmpty() );
	}
}
File file = new File(filename);

See java.io.File

Typically, you would use a particular package to do something with each file mime type. For PDF's, I've had success using the iText api. For MS products (Excel, Word, etc) you could try Apache's POI, although I have not used this one myself.

Edited 4 Years Ago by ztini: n/a

File file = new File(filename);

See java.io.File

Typically, you would use a particular package to do something with each file mime type. For PDF's, I've had success using the iText api. For MS products (Excel, Word, etc) you could try Apache's POI, although I have not used this one myself.

Thank you very much for so quick response! I will check it!

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